[Xen-changelog] [xen-unstable] libxl: include <ctype.h> and introduce CTYPE helper macro

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
# Date 1334150055 -3600
# Node ID e6db36100b1db9e67c9fed0ed087d10ec2625493
# Parent  f3c835decf4696e35730e319b17bff8136bfb27e
libxl: include <ctype.h> and introduce CTYPE helper macro

Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Committed-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
---


diff -r f3c835decf46 -r e6db36100b1d tools/libxl/libxl_internal.h
--- a/tools/libxl/libxl_internal.h      Wed Apr 11 14:14:14 2012 +0100
+++ b/tools/libxl/libxl_internal.h      Wed Apr 11 14:14:15 2012 +0100
@@ -33,6 +33,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <ctype.h>
 
 #include <sys/mman.h>
 #include <sys/poll.h>
@@ -1469,6 +1470,25 @@ static inline void libxl__ctx_unlock(lib
     } while(0)
 
 
+/*
+ * int CTYPE(ISFOO, char c);
+ * int CTYPE(toupper, char c);
+ * int CTYPE(tolower, char c);
+ *
+ * This is necessary because passing a simple char to a ctype.h
+ * is forbidden.  ctype.h macros take ints derived from _unsigned_ chars.
+ *
+ * If you have a char which might be EOF then you should already have
+ * it in an int representing an unsigned char, and you can use the
+ * <ctype.h> macros directly.  This generally happens only with values
+ * from fgetc et al.
+ *
+ * For any value known to be a character (eg, anything that came from
+ * a char[]), use CTYPE.
+ */
+#define CTYPE(isfoo,c) (isfoo((unsigned char)(c)))
+
+
 #endif
 
 /*

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